2001 jeep cherokee '' no bus '' when wet

that is a very serious CAN-BUS communication error code on mine.
i have full fsm.
you better get it checked at Jeep dealer.

it might be just random error.
is battery voltage saying above 12.6v at all times?
battery terminals clean?

Hello lhernandez79,

The P-1686 is NO SKIM BUS MESSAGE RECEIVED.

SKIM stands for Smart Key Immobilizer Module.

One way I have solved this code is to disconnect the battery for about five minutes this resets the module.

I hope this helps.

Regards,

netvan

well those jeeps are funny little critters when it comes to the battery terminals believe it or not if the battery terminals get to corroded it will crank most of the time and usually start but wont idle i would clean terminals real good and and charge it up real good and try it but like i said they usually at least start in ur case i would check the grounds and also u say it is a 1998 jeep cherokee is it a grand cherokee with a 4.0 straight 6 cause they usually have a coil pack for each cylynder mounted under a ignition module bolted on the head

also ignition module may b at fault but my money is on the batt or a bad ground if all hat happened is the battery got ran down

You may have internal corrosion in one of the battery cables at the battery connector, or the chassis ground wire terminal at the end away from the battery needs to be disconnected, cleaned, and reconnected.

Another possibility is a blown fusible link in the battery cable. If this is the case, you'll have to track down the electrical fault and repair it; otherwise you risk having the new link blow and stranding you out on the road. The first place to look would be any electrical device that had been behaving abnormally before the vehicle died (inspect the wiring for cuts, burns or breaks).

You sound pretty good at this
Go to a local repair shop and have
them print out a wiring diagram
They will have to be successful enough
to subcribe to All Data,Mitchell,etc

Check the ground circuits. Find out what wires are the ground suppllies. take a 12 volt test light from battery positive and probe the circuit if it lights up the ground is good is it does not bad ground. I would first check the wires in the door jam. where the harness from the car goes into the door. pull back the rubber cover I have seen tons of wire get damaged in there from the door opening and closing all the time. hope this helps.

yes i can
look verycarfully at the battery terminals.
make sure the cable that goes in to the terminal is nice and tight in there.
if tighten it up or replace.the terminals should be nice clean and in good meety condition.not burt or cracked or old.start there and then check the other sides of the battery cables and make sure there tight at there locations .
let me know if this helps.

thank you
jm

Loose or dirty ground connection at battery area.

Well, since the battery is on the right side in the engine compartment and you said you cleaned the terminals. Did you spray the terminals off with a hose and water? If so the distributor is located not far from the battery and you may have gotten the distributor a little moist in side which can cause it to nots tart or run rough. Pull the distributor cap and check for moisture. If wet just dry the cap and replace it .

I just had the same problem of my 2001 jeep cherokee not starting with no gauges responding and a "no bus" reading. After reading the responses I changed out the CPS and my jeep now runs great! however, it was not as hard as I thought it would be. Very easy with 7/16 bit and a 10inch extender. In and out in less than 5 minutes. Finding it was the hardest part. Blends in with the bell housing. I did this from under the jeep with a good shop light. I paid about $80 for the part here in Atlanta, GA